3o6 
The Ohio Naturalist. 
[Vol. V, No. 5, 
beyond the tendril. They are simple and coil in the usual man- 
ner. In case of Smilax Ijona-nox there is a decided widening at 
the base of the tendril: S. ecirrhata is usually without tendrils. 
The following greenbriers occur in Ohio: 
1. Smilax herbacea L. .5. Smilax hispida Muhl, 
2. “ ecirrhata (Engelm) Wats. (>. “ pseudo-China L. 
3. “ glauca Walt. 7. “ bona-nox L. 
4. “ rotundifolia L. 
In our R.\xuxcul.\ce.4: the leaves are the climlting organs, 
the petiole or petiolule is the sensitive part. In Clematis virgin- 
iana there are cases showing the transition from leaf to tendril. 
The leaflets drop oft' and leave the petiole presistent. There are 
two species in (Dhio: 
8. Clematis virginiana L. t). Clematis viorna L. 
One of the P.\p.\ver.\ce.4: has modified leaves which act as 
tendrils. The petiolule is the sensitive part. The leaflets are very 
much reduced often showing a transition from ordinary leaf 
parts to tendril. Our species is: 
10. Adlumia fungosa (Ait) Greene. 
The F.\b.4ce^ which have tendrils belong to the pea tribe, 
Vicieae. The ends of the leaves develop into tendrils which have 
from two to five branches, except Lathyrus ochroleucus in which 
the tendril is simple. The Ohio species are: 
1 1 . 
A'icia cracca L. 
17. 
Vicia angustifolia Roth. 
12. 
“ amerlcana Muhl. 
IS. 
Lathyrus maritimus (L.) Bigel. 
13. 
“ Carolina Walt. 
1!). 
“ venosus Muhl. 
14. 
“ tetrasperma (L.) r^Iocnch. 
20. 
“ palustris L. 
1.5. 
“ hirsuta (L.) Koch. 
21. 
“ myrtifolius Muhl. 
H). 
“ sativa (L.) 
22. 
“ ochroleucus 4Iook. 
In our species belonging to the Bigxoxi.vce.^: there are two 
leaflets and one branched tendril coming from the end of the 
presistent petiole. 
23. Bignonia crucigera L. 
The twig or shoot tendrils may represent ordinary branches 
or modified parts of a flower cluster and as in the leaf tendrils 
they may be either simple or branched. In Ohio are found four 
families with seventeen species belonging to this division or grou|). 
In the climbing S.\pixd.\ce.-e two tendrils occur at the 
base of the flower cluster. Our only species is the introduced: 
24. Cardiospermum lialicacabum L. 
In the ViT.4CEyE the tendrils appear on the twig opposite the 
leaf. They are usually branched several times. In some cases 
one of the branches of the tendril develops a rudimentary bunch 
of grapes, or there mav be a well developed l)unch of grapes with 
a rudimentary tendril. In Ampelopsis cordata and most other 
species of this family every third leaf node is without a tendril. 
The Ohio species are: 
